(19)
(11) EP 0 512 816 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
24.02.1993 Bulletin 1993/08

(43) Date of publication A2:
11.11.1992 Bulletin 1992/46

(21) Application number: 92304082.8

(22) Date of filing: 06.05.1992
(51) International Patent Classification (IPC)5: H01S 3/05, H01S 3/0941, H01S 3/109, H01S 3/083, G02B 7/00, H01S 3/086, H01S 3/02
(84) Designated Contracting States:
CH DE FR GB IT LI

(30) Priority: 09.05.1991 US 697790

(71) Applicant: COHERENT, INC.
Santa Clara, CA 95056 (US)

(72) Inventors:
  • Nightingale, John Lawrence
    Portola Valley, California 94028 (US)
  • Johnson, John Kelly
    Woodside, California 94062 (US)
  • Harris, John Rusty
    San Carlos, California 94070 (US)

(74) Representative: Jackson, David Spence et al
REDDIE & GROSE 16, Theobalds Road
London, WC1X 8PL
London, WC1X 8PL (GB)


(56) References cited: : 
   
       


    (54) Laser resonator assembly


    (57) A resonator assembly (10) particularly suited for a diode pumped solid state laser includes a glass planar support plate (20). At least two transparent mirror mounts (26,28) are bonded to the plate (20) using a UV curable adhesive. The resonator mirrors (22,24) are in turn bonded to the mounts (24,28) using a similar adhesive. The structure is easy to align and assemble and is low in cost. In addition, the assembly can be formed from materials having a low coefficient of thermal expansion so that the thermal stability is enhanced. Further, the transparent mirror mounts (26,28) provide enhanced stability while allowing transmission of laser radiation. A block (40) of a gain medium such as Nd:YAG, may be mounted in a Faraday effect magnet (48) bonded to the plate (20) and the frequency change of the gain medium with temperature be such that the variation of the resonant frequency of the resonator (20,24,40) with temperature maintains stability of operation. A pump beam (74) from a pump diode (70) can be directed through a mirror mount (26) into the resonator (22,24,40).






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